Air Shrine Restart

I've read the answers on how to go about the air shrine situation, I wanted to ask my question on the threads written about the air shrine, but I think they were locked as I didn't have the option of replying. Anyways, I'd like to restart that whole quest, but don't know how. How does one restart a quest? I thought by simply leaving and exiting out of Wizards when I came back I'd have to start all over, but that was not the case. I thank everyone in advance for replying. :)